Skip to main content
banner image
No data available.
Please log in to see this content.
You have no subscription access to this content.
No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
The full text of this article is not currently available.
1. Bertenyi, T. , and Graham, W. R. (2007). “ Experimental observations of the merger of co-rotating wake vortices,” J. Fluid Mech. 586, 397422.
2. Ffowcs Williams, J. E. , and Hawkings, D. L. (1969). “ Sound generation by turbulence and surfaces in arbitrary motion,” Philos. Trans. R. Soc. London A 264, 321342.
3. Howell, R. , Qin, N. , Edwards, J. , and Durrani, N. (2010). “ Wind tunnel and numerical study of a small vertical axis wind turbine,” Renewable Energy 35, 412422.
4. Magliozzi, B. , Hanson, D. B. , and Amiet, R. K. (1991). “ Propeller and propfan noise,” in Aeroacoustics of Flight Vehicles: Theory and Practice, NASA RP1258, edited by H. H. Hubbard ( National Aeronautics and Space Administration, Washington, DC), Vol. 1.
5.Microstrain (2014). “ Product specification and power curve,” QR5 Quietrevolution Turbine, (Last viewed September 30, 2014).
6. Shin, H. C. , Graham, W. R. , Sijtsma, P. , Andreou, C. , and Faszer, A. (2007). “ Implementation of a phased microphone array in a closed-section wind tunnel,” AIAA J. 45, 28972909.
7. Simons, M. (1994). Model Aircraft Aerodynamics, 3rd ed. ( Argus, Hemel Hempstead, UK).

Data & Media loading...


Article metrics loading...



Vertical-axis wind turbines are wind-energy generators suitable for use in urban environments. Their associated noise thus needs to be characterized and understood. As a first step, this work investigates the relative importance of harmonic and broadband contributions via model-scale wind-tunnel experiments. Cross-spectra from a pair of flush-mounted wall microphones exhibit both components, but further analysis shows that the broadband dominates at frequencies corresponding to the audible range in full-scale operation. This observation has detrimental implications for noise-prediction reliability and hence also for acoustic design optimization.


Full text loading...


Access Key

  • FFree Content
  • OAOpen Access Content
  • SSubscribed Content
  • TFree Trial Content
752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd